Deadpool became Deadpool through a series of complex and sometimes convoluted events in the comics. He was originally a mercenary named Wade Wilson, who underwent experimental treatments that gave him his unique powers and personality.
There is a loose link. The version of Deadpool in Wolverine Origins provided a starting point, but the standalone Deadpool movies developed his character and story in a more distinct and expanded way, deviating from the initial portrayal to create a more focused and engaging narrative.
It's a bit of a mixed bag. While there's a link, the portrayal of Deadpool in Wolverine Origins doesn't fully align with his later, more developed storyline. Some elements were changed or not fully explored.
Since I'm not familiar with specific Bob Barnard and Bob Armstrong fanfic, it's difficult to say. But common themes in fanfic in general can include friendship, adventure, and overcoming challenges.
Uncle Bob in the 'We Kids Uncle Bob Stories' is likely a character who has a special relationship with the kids. He could be a family member, like an actual uncle, who enjoys sharing his experiences and stories with the younger ones.
Bob Wills was likely a very important figure. Maybe he was a musician or an artist of some sort. Since he's called the 'king' in the story, he must have been highly respected in his community or field.